中华老年医学杂志
中華老年醫學雜誌
중화노년의학잡지
Chinese Journal of Geriatrics
2015年
5期
502-505
,共4页
脑血管造影术%体层摄影术,X线计算机
腦血管造影術%體層攝影術,X線計算機
뇌혈관조영술%체층섭영술,X선계산궤
Cerebral angiography%Tomography,X-ray computed
目的 探讨第二代双源CT双低扫描在头颈部血管成像(CTA)中的应用价值.方法 对2013年10月至2015年1月120例接受CTA的患者随机分为A、B、C、D四组.在固定管电压100 kV条件下,每组给予不同的管电流及不同剂量的造影剂威视派克270 mgI/ml和50 ml生理盐水.A组:管电流100 mA,造影剂50 ml;B组:管电流100mA,造影剂40 ml;C组:管电流80 mA,造影剂50 ml;D组:管电流80 mA,造影剂40 ml.分别测量各组患者的主动脉弓、双侧颈总动脉分叉处、双侧颈内动脉颅内段、双侧大脑中动脉M1段、椎动脉、基底动脉强化程度的CT值,观察锁骨下静脉和头臂静脉有无残留对比剂造成的伪影.采用5分法对重建图像的质量进行评分及对受照剂量进行计算.结果 (1)C组CTA平均有效剂量(0.53±0.17) mGy比A组(0.74±0.04)mGy降低了29％,C组CTA脑动脉血管的显影强度与A组相比差异无统计学意义(P=0.247),其噪声略大于A组,但差异无统计学意义(P=0.203).(2)A组CTA的平均有效剂量与B组(0.73±0.05)mGy的差异无统计学意义,两组间容积再现(VR)和多平面重建(MPR)图像中的脑动脉结构显示效果差异无统计学意义(P=0.114).(3)C组CTA的平均有效剂量与D组(0.53±0.01) mGy的差异无统计学意义,两组间VR和MPR图像中的脑动脉结构显示效果差异无统计学意义(P=0.109).(4)D组CTA平均有效剂量(0.53±0.01)mGy比B组(0.73±0.05)mGy降低了28％,C组CTA脑动脉血管的显影强度与A组相比差异无统计学意义(P=0.236),其噪声略大于A组,但差异无统计学意义(P=0.212).结论 双低扫描头颈部血管成像在临床的应用具有可行性,不仅可以获得较好的图像质量,而且满足临床诊断需要,具有良好的临床应用价值.
目的 探討第二代雙源CT雙低掃描在頭頸部血管成像(CTA)中的應用價值.方法 對2013年10月至2015年1月120例接受CTA的患者隨機分為A、B、C、D四組.在固定管電壓100 kV條件下,每組給予不同的管電流及不同劑量的造影劑威視派剋270 mgI/ml和50 ml生理鹽水.A組:管電流100 mA,造影劑50 ml;B組:管電流100mA,造影劑40 ml;C組:管電流80 mA,造影劑50 ml;D組:管電流80 mA,造影劑40 ml.分彆測量各組患者的主動脈弓、雙側頸總動脈分扠處、雙側頸內動脈顱內段、雙側大腦中動脈M1段、椎動脈、基底動脈彊化程度的CT值,觀察鎖骨下靜脈和頭臂靜脈有無殘留對比劑造成的偽影.採用5分法對重建圖像的質量進行評分及對受照劑量進行計算.結果 (1)C組CTA平均有效劑量(0.53±0.17) mGy比A組(0.74±0.04)mGy降低瞭29％,C組CTA腦動脈血管的顯影彊度與A組相比差異無統計學意義(P=0.247),其譟聲略大于A組,但差異無統計學意義(P=0.203).(2)A組CTA的平均有效劑量與B組(0.73±0.05)mGy的差異無統計學意義,兩組間容積再現(VR)和多平麵重建(MPR)圖像中的腦動脈結構顯示效果差異無統計學意義(P=0.114).(3)C組CTA的平均有效劑量與D組(0.53±0.01) mGy的差異無統計學意義,兩組間VR和MPR圖像中的腦動脈結構顯示效果差異無統計學意義(P=0.109).(4)D組CTA平均有效劑量(0.53±0.01)mGy比B組(0.73±0.05)mGy降低瞭28％,C組CTA腦動脈血管的顯影彊度與A組相比差異無統計學意義(P=0.236),其譟聲略大于A組,但差異無統計學意義(P=0.212).結論 雙低掃描頭頸部血管成像在臨床的應用具有可行性,不僅可以穫得較好的圖像質量,而且滿足臨床診斷需要,具有良好的臨床應用價值.
목적 탐토제이대쌍원CT쌍저소묘재두경부혈관성상(CTA)중적응용개치.방법 대2013년10월지2015년1월120례접수CTA적환자수궤분위A、B、C、D사조.재고정관전압100 kV조건하,매조급여불동적관전류급불동제량적조영제위시파극270 mgI/ml화50 ml생리염수.A조:관전류100 mA,조영제50 ml;B조:관전류100mA,조영제40 ml;C조:관전류80 mA,조영제50 ml;D조:관전류80 mA,조영제40 ml.분별측량각조환자적주동맥궁、쌍측경총동맥분차처、쌍측경내동맥로내단、쌍측대뇌중동맥M1단、추동맥、기저동맥강화정도적CT치,관찰쇄골하정맥화두비정맥유무잔류대비제조성적위영.채용5분법대중건도상적질량진행평분급대수조제량진행계산.결과 (1)C조CTA평균유효제량(0.53±0.17) mGy비A조(0.74±0.04)mGy강저료29％,C조CTA뇌동맥혈관적현영강도여A조상비차이무통계학의의(P=0.247),기조성략대우A조,단차이무통계학의의(P=0.203).(2)A조CTA적평균유효제량여B조(0.73±0.05)mGy적차이무통계학의의,량조간용적재현(VR)화다평면중건(MPR)도상중적뇌동맥결구현시효과차이무통계학의의(P=0.114).(3)C조CTA적평균유효제량여D조(0.53±0.01) mGy적차이무통계학의의,량조간VR화MPR도상중적뇌동맥결구현시효과차이무통계학의의(P=0.109).(4)D조CTA평균유효제량(0.53±0.01)mGy비B조(0.73±0.05)mGy강저료28％,C조CTA뇌동맥혈관적현영강도여A조상비차이무통계학의의(P=0.236),기조성략대우A조,단차이무통계학의의(P=0.212).결론 쌍저소묘두경부혈관성상재림상적응용구유가행성,불부가이획득교호적도상질량,이차만족림상진단수요,구유량호적림상응용개치.
Objective To investigate the application value of low kilovolt technique combined with lower contrast in the head and neck angiography by the second-generation dual source CT.Methods From October 2013 to January 2015,120 patients undergoing head and neck computed tomography angiography (CTA) were randomly divided into groups A,B,C,D.Each group was given a different tube current and different dose of contrast agent and saline solution 50 ml.Group A received current 100 mA and contrast agent 50 ml,group B received current 100 mA and contrast agent 40 ml,group C received current 80 mA and contrast agent 50 ml,and group D received current 80 mA and contrast agent 40 ml.CT values of aortic arch,bilateral common carotid artery bifurcation,double sided M1 segment of middle cerebral artery,basilar artery enhanced degree of the straight sinus were measured in each group.Residual artifacts caused by contrast agent in brachiocephalic vein and subclavian vein were observed.5-score method was used to assess the quality of reconstructed image,and the radiation exposure dose was calculated.Results The mean effective dose was reduced by 29％ in group C as compared with group A [(0.53±0.17) mGy vs.(0.74±0.04) mGy].There was no significant difference in developing strength in cerebral arteries angiography between group C and group A (P=0.247),but the inage noise was slightly larger in group C than group A,without significant differences (P=0.203).The average effective dose in group A was almost the same as that in group B [(0.74 ± 0.04) mGy vs.(0.73 ± 0.05) mGy].Structure display of cerebral arteries on CT volume rendering (VR) and multiplane reformation (MPR) images had no significant differences between group A and group B (P=0.114).The average effective dose in group C was almost the same as that in group D[(0.53 ± 0.17) mGy vs.(0.53 ±0.01) mGy].Structure display of cerebral arteries on CT volume rendering (VR) and muhiplane reformation (MPR) images had no significant differences between group C and group D (P=0.109).The mean effective dose was reduced by 28％ in group D as compared with group B[(0.53±0.01)mGy vs.(0.73±0.05) mGy].There was no significant difference in developing strength in cerebral arteries angiography between group C and group A (P=0.236),but the image noise was sligbtly larger in group C than group A (P =0.212).Conclusions Application of low tube current combined with low concentration of contrast agent in the head and neck dual-source CT angiography is feasible in clinical diagnosis,with good clinical value.It can not only get better image quality,but also meet the needs of clinical diagnosis.
